Show logical feeder loads in project and circuit views

tests/circuit-grid-projection.test.ts

@@ -47,7 +47,10 @@ function makeCircuit(
     sortOrder,
     isReserve: deviceRows.length === 0,
     circuitTotalPower: deviceRows.reduce((total, row) => total + row.rowTotalPower, 0),
+    circuitApparentPower: deviceRows.reduce((total, row) => total + row.rowTotalPower, 0),
+    circuitCosPhi: 1,
     deviceRows,
+    downstreamBoardLoads: [],
   };
 }
 
@@ -176,6 +179,44 @@ describe("circuit grid projection", () => {
     );
   });
 
+  it("renders linked downstream boards as separate read-only rows", () => {
+    const feeder = {
+      ...reserveCircuit,
+      isReserve: false,
+      circuitTotalPower: 4,
+      circuitApparentPower: 5,
+      circuitCosPhi: 0.8,
+      downstreamBoardLoads: [{
+        distributionBoardId: "board-child",
+        name: "Unterverteilung",
+        boardNumber: "UV-02",
+        activePowerKw: 4,
+        apparentPowerKva: 5,
+        cosPhi: 0.8,
+      }],
+    };
+    const rows = buildVisibleGridRowsWithStructure(
+      [{ ...sections[0], circuits: [feeder] }],
+      { headerComponents: [], footerComponents: [] }
+    );
+    assert.deepEqual(rows.map((row) => row.rowType), [
+      "section",
+      "circuitSummary",
+      "downstreamBoardLoad",
+      "placeholder",
+    ]);
+    const loadRow = rows[2];
+    assert.equal(
+      loadRow.cells.find((cell) => cell.cellKey === "displayName")?.value,
+      "Unterverteilung UV-02"
+    );
+    assert.equal(
+      loadRow.cells.find((cell) => cell.cellKey === "rowTotalPower")?.value,
+      4
+    );
+    assert.equal(loadRow.cells.every((cell) => !cell.editable), true);
+  });
+
   it("shows circuit protection once on each visible circuit row", () => {
     const protectedSections = sections.map((section) => ({
       ...section,